<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
</head>

<body>
    <div id="app">
        <p v-for="item of arr">
            <input type="checkbox" v-model="item.checked">{{item.name}}
        </p>
        <p>
            全选<input type="checkbox" v-model="allChecked">
        </p>
    </div>
    <script>
        new Vue({
            data() {
                return {
                    arr: [
                        { name: "html", checked: false },
                        { name: "css", checked: false },
                        { name: "js", checked: false },
                        { name: "vue", checked: false },
                        { name: "react", checked: false },
                    ]
                }
            },
            computed: {
                allChecked: {
                    get() {
                        return this.arr.every(item => item.checked)
                    },
                    set(val){
                        this.arr.forEach(item=>{
                            item.checked = val
                        })
                    }
                }
            }
        }).$mount("#app")
    </script>
</body>

</html>